Clownfish in trouble

[KMcGill]

I have a reefer 350 that’s about 4 months old

Livestock
Dispar Anthias 1x
Blue/green Chromis 3x
Yellow watchman goby 1x
Helfichi fire fish 1x
Randles pistol shrimp 1x
Turbo snails 10x
Aestrea snails 10x
Scarlet hermit crabs 10x
Horeshoe crab 1x
Davinci clownfish 1x


Water parameters

Ammonia 0.00 (Hanna tester)
Nitrite 0.00 (API Test)
Nitrate 0.00 (Hanna Test)
Phosphate 0.00 (Hanna Test)
Calcium 480 (API Test)
Alkalinity 7.7 ( Hanna Test)
Salinity 1.025
PH 7.8 (API Test)
Temp 78F

2 Weeks ago my DaVinci Clown jumped out before in the process of me adding my lid. He was out of the tank for less than a minute, he seemed fine. Now he stays in the back corner since jumping out. However today, he has been lying on the sand flat and will occasionally get up and swim but seems to be breathing rapidly. He hasn’t lost his color but doesn’t seem to be eating. We have had him for 4 months and moved him from an established 32 gallon Biocube 2 months ago. Is this a clown being a clown or is he sick?

Added pictures of tank and setup as well as the clown who is swimming a little after I tried to grab him since I thought he was dead he was laying flat.

 

[TX_REEF]

do you have surface agitation for gas exchange? The surface of your water seems extremely still. Fish will often have a reason for jumping, lack of oxygen could be one.